Radio communication apparatus, radio communication method, and radio communication system

Abstract

A radio communication apparatus includes: control circuitry, which, in operation, selects, as a radio channel used for transmission, at least one radio channel among a plurality of radio channels based on information on a reduction time of a sum of transmission time per unit time in each of the plurality of radio channels; and radio circuitry, which, in operation, performs transmission using the selected radio channel.

1 . A radio communication apparatus, comprising:
 control circuitry, which, in operation, selects, as a radio channel used for transmission, at least one radio channel among a plurality of radio channels based on information on a reduction time of a sum of transmission time per unit time in each of the plurality of radio channels; and   radio circuitry, which, in operation, performs transmission using the selected radio channel.   
     
     
         2 . The radio communication apparatus according to  claim 1 , wherein
 the control circuitry selects the radio channel used for transmission when a change request for a radio channel from another radio communication apparatus is received.   
     
     
         3 . The radio communication apparatus according to  claim 2 , wherein
 the change request indicates that the sum of transmission time per unit time has exceeded a threshold value based on a specified value in at least one of the plurality of the radio channels in the other radio communication apparatus.   
     
     
         4 . The radio communication apparatus according to  claim 2 , wherein
 the radio circuitry receives information on the reduction time from the other radio communication apparatus.   
     
     
         5 . The radio communication apparatus according to  claim 1 , wherein
 the information on the reduction time indicates a time taken for the sum of transmission time to decrease to less than a threshold value smaller than a specified value.   
     
     
         6 . The radio communication apparatus according to  claim 1 , wherein
 the control circuitry selects the radio channel used for transmission based on a usage status of each of the plurality of radio channels.   
     
     
         7 . A radio communication apparatus, comprising:
 radio circuitry, which, in operation, transmits, to another radio communication apparatus, information on a reduction time of a sum of transmission time of a radio channel in which the sum of transmission time per unit time has exceeded a threshold value based on a specified value; and   radio circuitry, which, in operation, performs transmission using a radio channel selected in the other radio communication apparatus based on the information on the reduction time.   
     
     
         8 . A radio communication method, comprising:
 selecting, by a radio communication apparatus, as a radio channel used for transmission, at least one radio channel among a plurality of radio channels based on information on a reduction time of a sum of transmission time per unit time for each of the plurality of radio channels; and   performing, by the radio communication apparatus, transmission using the selected radio channel.   
     
     
         9 . A radio communication method, comprising:
 transmitting, by a radio communication apparatus, to another radio communication apparatus, information on a reduction time of a sum of transmission time of a radio channel in which the sum of transmission time per unit time has exceeded a threshold value based on a specified value; and   performing, by the radio communication apparatus, transmission using a radio channel selected in the other radio communication apparatus based on the information on the reduction time.   
     
     
         10 . A radio communication system, comprising:
 a first radio communication apparatus; and   a second radio communication apparatus, wherein   the first radio communication apparatus transmits, to the second radio communication apparatus, information on a reduction time of a sum of transmission time of a radio channel in which the sum of transmission time per unit time has exceeded a threshold value based on a specified value,   the second radio communication apparatus selects, as a radio channel used for transmission, at least one radio channel among a plurality of radio channels based on the information on the reduction time of the sum of transmission time per unit time in each of the plurality of radio channels, and   the first radio communication apparatus and the second radio communication apparatus perform transmission using the selected radio channel.